Options

For Citroen Ds fitted with hydraulic gearbox, it is possible to build a gearbox with longer drive, similar to a 5 speed mechanical gearbox.
This is an interesting option for anyone using their Citroen Ds 21 ie and Ds 23 ie on long motorway journeys.
It will have the same 4 speed gearbox but the ratio will be modified so that the engine will be running slower in 4th gear. We are able to make the adjustment on the bevel gear.